Tell your doctor immediately if any of these rare but very serious side effects occur:
- easy bruising/bleeding
- slow/fast/irregular heartbeat
- signs of infection (e.g., sore throat)
- severe muscle spasm/cramping (e.g., twisting neck, arching back, eyes rolling up)
- persistent nausea
- seizures
- stomach/abdominal pain
- dark urine
- yellowing eyes/skin
This drug may rarely cause a serious (sometimes fatal) nervous system problem (neuroleptic malignant syndrome-NMS). Seek immediate medical attention if you notice any of the following rare but very serious side effects: fever, stiff muscles, increased sweating, fast heartbeat, mental/mood changes, change in the amount of urine.
A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:
- rash
- itching/swelling (especially of the face/tongue/throat)
- severe dizziness
- trouble breathing
This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.
Call your doctor for medical advice about side effects. In the US, you may report side effects to the Food and Drug Administration (FDA) at 1-800-FDA-1088.
In Canada, you may report side effects to Health Canada at 1-866-234-2345.
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